#------------------------------------------------------------------------------ #$Date: 2016-03-25 10:34:10 +0200 (Fri, 25 Mar 2016) $ #$Revision: 179754 $ #$URL: file:///home/coder/svn-repositories/cod/cif/7/00/50/7005096.cif $ #------------------------------------------------------------------------------ # # This file is available in the Crystallography Open Database (COD), # http://www.crystallography.net/ # # All data on this site have been placed in the public domain by the # contributors. # data_7005096 loop_ _publ_author_name 'Duan, Lele' 'Wang, Mei' 'Li, Ping' 'Na, Yong' 'Wang, Ning' 'Sun, Licheng' _publ_section_title ; Carbene-pyridine chelating 2Fe2S hydrogenase model complexes as highly active catalysts for the electrochemical reduction of protons from weak acid (HOAc). ; _journal_issue 13 _journal_name_full 'Dalton transactions (Cambridge, England : 2003)' _journal_page_first 1277 _journal_page_last 1283 _journal_paper_doi 10.1039/b616645h _journal_year 2007 _chemical_formula_moiety 'C22 H20 Fe2 N4 O4 S2' _chemical_formula_sum 'C22 H20 Fe2 N4 O4 S2' _chemical_formula_weight 580.24 _space_group_IT_number 2 _symmetry_cell_setting triclinic _symmetry_space_group_name_Hall '-P 1' _symmetry_space_group_name_H-M 'P -1' _atom_sites_solution_hydrogens geom _atom_sites_solution_primary direct _atom_sites_solution_secondary difmap _audit_creation_date 'Oct 31 18:25:00 2006' _audit_creation_method SHELXL-97 _cell_angle_alpha 105.748(5) _cell_angle_beta 97.211(4) _cell_angle_gamma 103.396(5) _cell_formula_units_Z 2 _cell_length_a 9.285(4) _cell_length_b 10.784(4) _cell_length_c 12.913(5) _cell_measurement_reflns_used 2371 _cell_measurement_temperature 273(2) _cell_measurement_theta_max 17.80 _cell_measurement_theta_min 3.05 _cell_volume 1185.8(8) _computing_cell_refinement 'SMART (Bruker, 1997)' _computing_data_collection 'SMART (Bruker, 1997)' _computing_data_reduction 'SAINT (Bruker, 1997)' _computing_molecular_graphics 'SHELXP97 (Sheldrick, 1997)' _computing_publication_material 'SHELXTL (Bruker, 1997)' _computing_structure_refinement 'SHELXL97 (Sheldrick, 1997)' _computing_structure_solution 'SHELXS97 (Sheldrick, 1997)' _diffrn_ambient_temperature 273(2) _diffrn_measured_fraction_theta_full 0.971 _diffrn_measured_fraction_theta_max 0.971 _diffrn_measurement_device_type 'CCD area detector' _diffrn_measurement_method 'phi and omega scans' _diffrn_radiation_monochromator graphite _diffrn_radiation_source 'fine-focus sealed tube' _diffrn_radiation_type MoK\a _diffrn_radiation_wavelength 0.71073 _diffrn_reflns_av_R_equivalents 0.0163 _diffrn_reflns_av_sigmaI/netI 0.0393 _diffrn_reflns_limit_h_max 11 _diffrn_reflns_limit_h_min -11 _diffrn_reflns_limit_k_max 6 _diffrn_reflns_limit_k_min -13 _diffrn_reflns_limit_l_max 15 _diffrn_reflns_limit_l_min -14 _diffrn_reflns_number 6370 _diffrn_reflns_theta_full 26.00 _diffrn_reflns_theta_max 26.00 _diffrn_reflns_theta_min 2.04 _exptl_absorpt_coefficient_mu 1.437 _exptl_absorpt_correction_T_max 0.9316 _exptl_absorpt_correction_T_min 0.5336 _exptl_absorpt_correction_type multi-scan _exptl_absorpt_process_details SADABS _exptl_crystal_colour black _exptl_crystal_density_diffrn 1.625 _exptl_crystal_density_method 'not measured' _exptl_crystal_description prism _exptl_crystal_F_000 592 _exptl_crystal_size_max 0.50 _exptl_crystal_size_mid 0.23 _exptl_crystal_size_min 0.05 _refine_diff_density_max 1.134 _refine_diff_density_min -0.462 _refine_diff_density_rms 0.075 _refine_ls_extinction_method none _refine_ls_goodness_of_fit_ref 1.048 _refine_ls_hydrogen_treatment constr _refine_ls_matrix_type full _refine_ls_number_parameters 307 _refine_ls_number_reflns 4548 _refine_ls_number_restraints 6 _refine_ls_restrained_S_all 1.054 _refine_ls_R_factor_all 0.0536 _refine_ls_R_factor_gt 0.0388 _refine_ls_shift/su_max 0.001 _refine_ls_shift/su_mean 0.000 _refine_ls_structure_factor_coef Fsqd _refine_ls_weighting_details 'calc w=1/[\s^2^(Fo^2^)+(0.0525P)^2^+0.2718P] where P=(Fo^2^+2Fc^2^)/3' _refine_ls_weighting_scheme calc _refine_ls_wR_factor_gt 0.0938 _refine_ls_wR_factor_ref 0.1017 _reflns_number_gt 3570 _reflns_number_total 4548 _reflns_threshold_expression >2sigma(I) _cod_data_source_file b616645h.txt _cod_data_source_block Py580 _cod_depositor_comments ; The following automatic conversions were performed: '_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic' according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29. Automatic conversion script Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius ; _cod_original_sg_symbol_H-M 'P-1 ' _cod_database_code 7005096 loop_ _symmetry_equiv_pos_as_xyz 'x, y, z' '-x, -y, -z' loop_ _atom_site_label _atom_site_type_symbol _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv _atom_site_adp_type _atom_site_occupancy _atom_site_symmetry_multiplicity _atom_site_calc_flag _atom_site_refinement_flags _atom_site_disorder_assembly _atom_site_disorder_group Fe1 Fe 0.77936(5) 0.99646(5) 0.37030(4) 0.03098(14) Uani 1 1 d . . . Fe2 Fe 0.60925(5) 0.86429(4) 0.18161(3) 0.02814(13) Uani 1 1 d . . . S1 S 0.72202(9) 1.08668(8) 0.23487(7) 0.03321(19) Uani 1 1 d . . . S2 S 0.52543(9) 0.90563(8) 0.33711(7) 0.0339(2) Uani 1 1 d . . . N1 N 0.7529(3) 0.8400(3) 0.0758(2) 0.0349(6) Uani 1 1 d . . . N2 N 0.6890(3) 0.6146(3) 0.1557(2) 0.0382(7) Uani 1 1 d . . . N3 N 0.4550(3) 0.5754(3) 0.1645(2) 0.0391(7) Uani 1 1 d . . . N4 N 0.0877(4) 0.4957(3) 0.2390(3) 0.0545(8) Uani 1 1 d . . . O1 O 0.8604(4) 1.2122(3) 0.5813(2) 0.0712(9) Uani 1 1 d . . . O2 O 1.0734(3) 1.0324(4) 0.3074(2) 0.0693(9) Uani 1 1 d . . . O3 O 0.7863(3) 0.7614(3) 0.4388(3) 0.0661(8) Uani 1 1 d . . . O4 O 0.3354(3) 0.8225(3) 0.0265(2) 0.0616(8) Uani 1 1 d . . . C1 C 0.8246(4) 1.1307(4) 0.4985(3) 0.0415(8) Uani 1 1 d . . . C2 C 0.9589(4) 1.0181(4) 0.3347(3) 0.0415(8) Uani 1 1 d . . . C3 C 0.7872(4) 0.8553(4) 0.4134(3) 0.0410(8) Uani 1 1 d . . . C4 C 0.4477(4) 0.8390(3) 0.0865(3) 0.0363(7) Uani 1 1 d . . . C6 C 0.5911(5) 1.1879(4) 0.2693(3) 0.0528(10) Uani 1 1 d U . . H6A H 0.6484 1.2816 0.2920 0.063 Uiso 1 1 calc R . . H6B H 0.5188 1.1715 0.2026 0.063 Uiso 1 1 calc R . . C7 C 0.5058(6) 1.1676(5) 0.3545(5) 0.0815(15) Uani 1 1 d U . . H7A H 0.5762 1.2082 0.4246 0.098 Uiso 1 1 calc R . . H7B H 0.4327 1.2189 0.3549 0.098 Uiso 1 1 calc R . . C8 C 0.4251(4) 1.0341(4) 0.3515(3) 0.0522(10) Uani 1 1 d . . . H8A H 0.3386 1.0014 0.2911 0.063 Uiso 1 1 calc R . . H8B H 0.3862 1.0422 0.4186 0.063 Uiso 1 1 calc R . . C9 C 0.7527(4) 0.9022(3) -0.0016(3) 0.0398(8) Uani 1 1 d . . . H9A H 0.6892 0.9574 -0.0021 0.048 Uiso 1 1 calc R . . C10 C 0.8400(5) 0.8894(4) -0.0797(3) 0.0530(10) Uani 1 1 d . . . H10A H 0.8338 0.9335 -0.1320 0.064 Uiso 1 1 calc R . . C11 C 0.9367(5) 0.8107(4) -0.0796(3) 0.0582(11) Uani 1 1 d . . . H11A H 0.9986 0.8014 -0.1309 0.070 Uiso 1 1 calc R . . C12 C 0.9395(4) 0.7460(4) -0.0018(3) 0.0516(10) Uani 1 1 d . . . H12A H 1.0040 0.6919 0.0000 0.062 Uiso 1 1 calc R . . C13 C 0.8466(4) 0.7607(3) 0.0743(3) 0.0387(8) Uani 1 1 d . . . C14 C 0.8434(4) 0.6867(4) 0.1579(3) 0.0441(9) Uani 1 1 d . . . H14A H 0.9034 0.6237 0.1424 0.053 Uiso 1 1 calc R . . H14B H 0.8876 0.7500 0.2305 0.053 Uiso 1 1 calc R . . C5 C 0.5784(4) 0.6769(3) 0.1710(3) 0.0328(7) Uani 1 1 d . . . C15 C 0.6344(5) 0.4777(4) 0.1369(3) 0.0502(10) Uani 1 1 d . . . H15A H 0.6889 0.4148 0.1233 0.060 Uiso 1 1 calc R . . C16 C 0.4892(5) 0.4538(4) 0.1422(3) 0.0512(10) Uani 1 1 d . . . H16A H 0.4227 0.3707 0.1327 0.061 Uiso 1 1 calc R . . C17 C 0.3037(4) 0.5892(4) 0.1734(3) 0.0454(9) Uani 1 1 d . . . H17A H 0.2367 0.5438 0.1023 0.054 Uiso 1 1 calc R . . H17B H 0.3078 0.6835 0.1923 0.054 Uiso 1 1 calc R . . C18 C 0.2380(4) 0.5327(3) 0.2579(3) 0.0439(8) Uani 1 1 d . . . C19 C 0.3267(5) 0.5235(5) 0.3477(4) 0.0660(12) Uani 1 1 d . . . H19A H 0.4315 0.5536 0.3594 0.079 Uiso 1 1 calc R . . C20 C 0.2578(7) 0.4689(6) 0.4203(4) 0.0819(15) Uani 1 1 d . . . H20A H 0.3149 0.4609 0.4814 0.098 Uiso 1 1 calc R . . C21 C 0.1029(7) 0.4268(5) 0.3998(5) 0.0811(16) Uani 1 1 d . . . H21A H 0.0530 0.3871 0.4457 0.097 Uiso 1 1 calc R . . C22 C 0.0234(6) 0.4439(5) 0.3115(5) 0.0737(14) Uani 1 1 d . . . H22A H -0.0815 0.4183 0.3004 0.088 Uiso 1 1 calc R . . loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_23 _atom_site_aniso_U_13 _atom_site_aniso_U_12 Fe1 0.0293(3) 0.0348(3) 0.0296(2) 0.0110(2) 0.00663(19) 0.0090(2) Fe2 0.0297(3) 0.0271(2) 0.0292(2) 0.01058(19) 0.00712(18) 0.00820(19) S1 0.0363(5) 0.0299(4) 0.0362(4) 0.0139(4) 0.0104(3) 0.0086(3) S2 0.0310(4) 0.0394(5) 0.0355(4) 0.0155(4) 0.0121(3) 0.0104(4) N1 0.0365(16) 0.0325(15) 0.0332(14) 0.0069(12) 0.0090(12) 0.0080(12) N2 0.0453(17) 0.0326(15) 0.0405(16) 0.0122(13) 0.0110(13) 0.0158(13) N3 0.0449(17) 0.0278(15) 0.0434(16) 0.0135(13) 0.0086(13) 0.0049(13) N4 0.049(2) 0.0431(19) 0.064(2) 0.0084(16) 0.0196(17) 0.0050(16) O1 0.078(2) 0.063(2) 0.0506(18) -0.0110(16) 0.0025(15) 0.0166(17) O2 0.0405(16) 0.116(3) 0.0702(19) 0.0475(19) 0.0239(14) 0.0276(17) O3 0.073(2) 0.0576(19) 0.079(2) 0.0391(17) 0.0087(16) 0.0203(16) O4 0.0527(17) 0.0577(18) 0.0694(19) 0.0228(15) -0.0131(14) 0.0156(14) C1 0.039(2) 0.041(2) 0.043(2) 0.0110(18) 0.0070(16) 0.0103(17) C2 0.040(2) 0.051(2) 0.0389(19) 0.0188(17) 0.0086(16) 0.0152(17) C3 0.041(2) 0.045(2) 0.0393(19) 0.0155(17) 0.0070(15) 0.0129(17) C4 0.045(2) 0.0288(18) 0.0386(18) 0.0132(15) 0.0087(16) 0.0130(15) C6 0.062(3) 0.040(2) 0.070(3) 0.0244(19) 0.022(2) 0.0277(19) C7 0.078(3) 0.062(3) 0.130(4) 0.036(3) 0.051(3) 0.043(3) C8 0.049(2) 0.066(3) 0.061(2) 0.027(2) 0.0285(19) 0.034(2) C9 0.047(2) 0.0385(19) 0.0325(18) 0.0124(15) 0.0099(15) 0.0067(16) C10 0.066(3) 0.045(2) 0.038(2) 0.0091(18) 0.0201(19) -0.003(2) C11 0.063(3) 0.048(2) 0.056(2) 0.005(2) 0.037(2) 0.000(2) C12 0.045(2) 0.042(2) 0.062(3) 0.0042(19) 0.0212(19) 0.0097(18) C13 0.0366(19) 0.0336(18) 0.0400(19) 0.0030(15) 0.0108(15) 0.0070(15) C14 0.044(2) 0.044(2) 0.049(2) 0.0118(17) 0.0124(17) 0.0235(18) C5 0.0382(19) 0.0305(17) 0.0292(16) 0.0089(14) 0.0057(14) 0.0095(15) C15 0.070(3) 0.033(2) 0.055(2) 0.0166(18) 0.016(2) 0.0220(19) C16 0.064(3) 0.0248(19) 0.060(2) 0.0127(17) 0.010(2) 0.0062(18) C17 0.039(2) 0.041(2) 0.052(2) 0.0201(18) 0.0029(17) -0.0010(16) C18 0.051(2) 0.0287(18) 0.052(2) 0.0124(16) 0.0123(18) 0.0091(16) C19 0.065(3) 0.075(3) 0.068(3) 0.036(3) 0.017(2) 0.020(2) C20 0.104(4) 0.098(4) 0.079(3) 0.059(3) 0.040(3) 0.047(3) C21 0.112(5) 0.069(3) 0.093(4) 0.045(3) 0.066(4) 0.036(3) C22 0.070(3) 0.060(3) 0.090(4) 0.014(3) 0.043(3) 0.011(2) loop_ _atom_type_symbol _atom_type_description _atom_type_scat_dispersion_real _atom_type_scat_dispersion_imag _atom_type_scat_source C C 0.0033 0.0016 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' H H 0.0000 0.0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' N N 0.0061 0.0033 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' O O 0.0106 0.0060 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' S S 0.1246 0.1234 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' Fe Fe 0.3463 0.8444 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' loop_ _geom_angle_atom_site_label_1 _geom_angle_atom_site_label_2 _geom_angle_atom_site_label_3 _geom_angle _geom_angle_site_symmetry_1 _geom_angle_site_symmetry_3 _geom_angle_publ_flag C2 Fe1 C3 94.48(16) . . ? C2 Fe1 C1 99.97(17) . . ? C3 Fe1 C1 102.80(16) . . ? C2 Fe1 S2 153.91(12) . . ? C3 Fe1 S2 84.20(12) . . ? C1 Fe1 S2 105.74(11) . . ? C2 Fe1 S1 84.81(11) . . ? C3 Fe1 S1 150.32(12) . . ? C1 Fe1 S1 106.55(12) . . ? S2 Fe1 S1 83.75(3) . . ? C2 Fe1 Fe2 100.36(12) . . ? C3 Fe1 Fe2 96.23(12) . . ? C1 Fe1 Fe2 150.83(11) . . ? S2 Fe1 Fe2 54.13(3) . . ? S1 Fe1 Fe2 55.06(3) . . ? C4 Fe2 C5 95.56(14) . . ? C4 Fe2 N1 98.13(14) . . ? C5 Fe2 N1 87.75(12) . . ? C4 Fe2 S2 101.41(11) . . ? C5 Fe2 S2 91.47(9) . . ? N1 Fe2 S2 160.43(8) . . ? C4 Fe2 S1 105.28(11) . . ? C5 Fe2 S1 159.12(10) . . ? N1 Fe2 S1 88.07(8) . . ? S2 Fe2 S1 85.72(3) . . ? C4 Fe2 Fe1 148.82(11) . . ? C5 Fe2 Fe1 105.50(10) . . ? N1 Fe2 Fe1 105.30(8) . . ? S2 Fe2 Fe1 56.15(4) . . ? S1 Fe2 Fe1 56.18(3) . . ? C6 S1 Fe2 113.03(14) . . ? C6 S1 Fe1 111.09(13) . . ? Fe2 S1 Fe1 68.76(3) . . ? C8 S2 Fe2 112.40(13) . . ? C8 S2 Fe1 111.55(14) . . ? Fe2 S2 Fe1 69.71(3) . . ? C9 N1 C13 116.5(3) . . ? C9 N1 Fe2 118.9(2) . . ? C13 N1 Fe2 124.5(2) . . ? C5 N2 C15 111.4(3) . . ? C5 N2 C14 122.4(3) . . ? C15 N2 C14 126.2(3) . . ? C5 N3 C16 111.0(3) . . ? C5 N3 C17 125.5(3) . . ? C16 N3 C17 123.4(3) . . ? C18 N4 C22 116.6(4) . . ? O1 C1 Fe1 175.6(3) . . ? O2 C2 Fe1 177.2(3) . . ? O3 C3 Fe1 177.2(3) . . ? O4 C4 Fe2 176.9(3) . . ? C7 C6 S1 118.0(3) . . ? C7 C6 H6A 107.8 . . ? S1 C6 H6A 107.8 . . ? C7 C6 H6B 107.8 . . ? S1 C6 H6B 107.8 . . ? H6A C6 H6B 107.1 . . ? C8 C7 C6 120.9(4) . . ? C8 C7 H7A 107.1 . . ? C6 C7 H7A 107.1 . . ? C8 C7 H7B 107.1 . . ? C6 C7 H7B 107.1 . . ? H7A C7 H7B 106.8 . . ? C7 C8 S2 118.9(3) . . ? C7 C8 H8A 107.6 . . ? S2 C8 H8A 107.6 . . ? C7 C8 H8B 107.6 . . ? S2 C8 H8B 107.6 . . ? H8A C8 H8B 107.0 . . ? N1 C9 C10 124.1(3) . . ? N1 C9 H9A 117.9 . . ? C10 C9 H9A 117.9 . . ? C9 C10 C11 119.2(4) . . ? C9 C10 H10A 120.4 . . ? C11 C10 H10A 120.4 . . ? C12 C11 C10 118.0(3) . . ? C12 C11 H11A 121.0 . . ? C10 C11 H11A 121.0 . . ? C11 C12 C13 120.4(4) . . ? C11 C12 H12A 119.8 . . ? C13 C12 H12A 119.8 . . ? N1 C13 C12 121.7(3) . . ? N1 C13 C14 116.9(3) . . ? C12 C13 C14 121.4(3) . . ? N2 C14 C13 110.8(3) . . ? N2 C14 H14A 109.5 . . ? C13 C14 H14A 109.5 . . ? N2 C14 H14B 109.5 . . ? C13 C14 H14B 109.5 . . ? H14A C14 H14B 108.1 . . ? N2 C5 N3 103.5(3) . . ? N2 C5 Fe2 122.2(2) . . ? N3 C5 Fe2 133.9(2) . . ? C16 C15 N2 106.8(3) . . ? C16 C15 H15A 126.6 . . ? N2 C15 H15A 126.6 . . ? C15 C16 N3 107.3(3) . . ? C15 C16 H16A 126.3 . . ? N3 C16 H16A 126.3 . . ? N3 C17 C18 113.7(3) . . ? N3 C17 H17A 108.8 . . ? C18 C17 H17A 108.8 . . ? N3 C17 H17B 108.8 . . ? C18 C17 H17B 108.8 . . ? H17A C17 H17B 107.7 . . ? N4 C18 C19 123.2(4) . . ? N4 C18 C17 114.2(3) . . ? C19 C18 C17 122.6(4) . . ? C18 C19 C20 119.0(5) . . ? C18 C19 H19A 120.5 . . ? C20 C19 H19A 120.5 . . ? C21 C20 C19 118.3(5) . . ? C21 C20 H20A 120.9 . . ? C19 C20 H20A 120.9 . . ? C22 C21 C20 119.1(4) . . ? C22 C21 H21A 120.5 . . ? C20 C21 H21A 120.5 . . ? N4 C22 C21 123.8(5) . . ? N4 C22 H22A 118.1 . . ? C21 C22 H22A 118.1 . . ? loop_ _geom_bond_atom_site_label_1 _geom_bond_atom_site_label_2 _geom_bond_distance _geom_bond_site_symmetry_2 _geom_bond_publ_flag Fe1 C2 1.765(4) . ? Fe1 C3 1.770(4) . ? Fe1 C1 1.804(4) . ? Fe1 S2 2.2693(12) . ? Fe1 S1 2.2844(11) . ? Fe1 Fe2 2.5629(9) . ? Fe2 C4 1.732(4) . ? Fe2 C5 1.938(3) . ? Fe2 N1 2.035(3) . ? Fe2 S2 2.2143(11) . ? Fe2 S1 2.2542(12) . ? S1 C6 1.831(4) . ? S2 C8 1.823(4) . ? N1 C9 1.346(4) . ? N1 C13 1.352(4) . ? N2 C5 1.359(4) . ? N2 C15 1.387(4) . ? N2 C14 1.456(4) . ? N3 C5 1.365(4) . ? N3 C16 1.384(4) . ? N3 C17 1.462(5) . ? N4 C18 1.330(5) . ? N4 C22 1.347(6) . ? O1 C1 1.136(4) . ? O2 C2 1.152(4) . ? O3 C3 1.146(4) . ? O4 C4 1.164(4) . ? C6 C7 1.468(6) . ? C6 H6A 0.9700 . ? C6 H6B 0.9700 . ? C7 C8 1.449(6) . ? C7 H7A 0.9700 . ? C7 H7B 0.9700 . ? C8 H8A 0.9700 . ? C8 H8B 0.9700 . ? C9 C10 1.368(5) . ? C9 H9A 0.9300 . ? C10 C11 1.371(6) . ? C10 H10A 0.9300 . ? C11 C12 1.371(6) . ? C11 H11A 0.9300 . ? C12 C13 1.388(5) . ? C12 H12A 0.9300 . ? C13 C14 1.505(5) . ? C14 H14A 0.9700 . ? C14 H14B 0.9700 . ? C15 C16 1.326(6) . ? C15 H15A 0.9300 . ? C16 H16A 0.9300 . ? C17 C18 1.513(5) . ? C17 H17A 0.9700 . ? C17 H17B 0.9700 . ? C18 C19 1.376(6) . ? C19 C20 1.383(6) . ? C19 H19A 0.9300 . ? C20 C21 1.371(7) . ? C20 H20A 0.9300 . ? C21 C22 1.358(7) . ? C21 H21A 0.9300 . ? C22 H22A 0.9300 . ?